The "elite student in music room 2" turns out to be Haruki's delinquent classmate, Kazusa Touma.  With his characteristic pushiness, he tries to get her to join the light music club.  But his pushiness backfires, and only makes her more annoyed.  Setsuna gets irritated... no, involved, and approaches Kazusa secretly.
It took me a while to get things ready.
Es hat eine Weile gedauert, 
bis alles fertig war.
Tomó un tiempo preparar todo.
He tardado un poco en prepararlo todo.
Les préparatifs m’ont 
pris un peu de temps.
Demorou um pouquinho para eu preparar.